feat: remove embedded FTPD (~3,300 LOC, ~48 KB runtime)

Delete all src/ftp*.c files (32 files) and include/ftpd.h.
Extract UCHAR/USHRT/UINT/ULONG/U64 typedefs into include/types.h.
Update include/httpcgi.h to use types.h instead of inline typedefs.

In include/httpd.h:
- Remove #include "ftpd.h", add #include "types.h"
- Replace FTPD *ftpd field with void *unused_50 (offset-stable)

In src/httpd.c:
- Remove FTP listener creation and accept() from socket_thread
- Remove FTPC eye-catcher branch from worker_thread
- Remove ftpdterm() call from terminate()

In src/httpdsrv.c:
- Remove display_ftpd() and FTPD table row
- Remove FTPC branch from display_queue_data()

In src/httpcons.c:
- Remove FTPD port display and FTPC branch from d_queue()

Fixes #42

Author: mgrossmann

include/ftpd.h

@@ -34,10 +34,7 @@
 /* Basic typedefs (no dependency)                                      */
 /* ------------------------------------------------------------------ */
 
-typedef unsigned char   UCHAR;
-typedef unsigned short  USHRT;
-typedef unsigned int    UINT;
-typedef unsigned long   ULONG;
+#include "types.h"
 
 /* ------------------------------------------------------------------ */
 /* Forward declarations — CGI modules hold pointers, never dereference */

include/httpcgi.h

@@ -41,7 +41,7 @@
 #include "dbg.h"                    /* debugging goodies            */
 #include "errors.h"                 /* the missing errno values     */
 #include "racf.h"                   /* security environment         */
-#include "ftpd.h"                   /* FTP daemon and client        */
+#include "types.h"                  /* UCHAR, USHRT, UINT, ULONG    */
 #include "cred.h"					/* Credentials					*/
 #include "mqtc370.h"                /* MQTT Client                  */
 #include "httpxlat.h"               /* ASCII/EBCDIC translation     */
@@ -63,14 +63,6 @@ typedef enum   rdw      RDW;        /* RDW option                   */
 
 #include "httppub.h"                /* HTTP Telemetry Publisher     */
 
-#if 0   /* declared in FTPD.H */
-typedef unsigned char   UCHAR;
-typedef unsigned short  USHRT;
-typedef unsigned int    UINT;
-typedef unsigned long   ULONG;
-typedef unsigned long long U64;
-#endif
-
 #ifndef OR
 #define OR ??!??!                   /* logical OR trigraph          */
 #endif
@@ -122,7 +114,7 @@ struct httpd {
     char        rname[12];          /* 38 resource name             */
     HTTPCGI     **httpcgi;          /* 44 CGI path and programs     */
 	time64_t 	uptime;				/* 48 Server startup time		*/
-    FTPD        *ftpd;              /* 50 FTP daemon                */
+    void        *unused_50;         /* 50 (was: FTPD *ftpd)         */
     UFSSYS      *ufssys;            /* 54 Unix like file system     */
     LUAX		*luax;				/* 58 Lua function vector		*/
     const char  *version;			/* 5C HTTPD Version				*/

include/httpd.h

@@ -0,0 +1,13 @@
+#ifndef TYPES_H
+#define TYPES_H
+/*
+** TYPES.H - Basic unsigned type definitions for HTTPD and CGI modules
+*/
+
+typedef unsigned char       UCHAR;
+typedef unsigned short      USHRT;
+typedef unsigned int        UINT;
+typedef unsigned long       ULONG;
+typedef unsigned long long  U64;
+
+#endif